USOS

From SKYbrary Wiki

Definition

Usage Notes

An undershoot/overshoot of a runway/helipad/helideck occurs in close proximity to the runway/helipad/helideck and also includes offside touchdowns and any occurrence where the landing gear touches off the runway/helipad/helideck surface.

Off-airport emergency landings are excluded from this category.

To be used for occurrences during the landing phase.

Includes offside touchdowns on heliports, helidecks and other defined areas to be used wholly or in part for the arrival, departure and surface movement of helicopters (does not include helicopter unprepared or natural landing sites).